Oral exercise device



FIG. 1 is a perspective view of an oral exercise device.

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged cross-sectional view thereof, taken along line 8-8 of FIG. 6.

The broken lines in the figures depict portions of the oral exercise device that form no part of the claimed design. 

CLAIM I claim the ornamental design for an oral exercise device, as shown and described. 